1 /* 2 * Copyright 2002-2010, Axel Dörfler, axeld@pinc-software.de. 3 * Distributed under the terms of the MIT License. 4 * 5 * Copyright 2001-2002, Travis Geiselbrecht. All rights reserved. 6 * Distributed under the terms of the NewOS License. 7 */ 8 9 10 /*! This is main - initializes the kernel and launches the Bootscript */ 11 12 13 #include <string.h> 14 15 #include <FindDirectory.h> 16 #include <OS.h> 17 18 #include <arch/platform.h> 19 #include <boot_device.h> 20 #include <boot_item.h> 21 #include <boot_splash.h> 22 #include <commpage.h> 23 #include <condition_variable.h> 24 #include <cpu.h> 25 #include <debug.h> 26 #include <DPC.h> 27 #include <elf.h> 28 #include <find_directory_private.h> 29 #include <fs/devfs.h> 30 #include <fs/KPath.h> 31 #include <int.h> 32 #include <kdevice_manager.h> 33 #include <kdriver_settings.h> 34 #include <kernel_daemon.h> 35 #include <kmodule.h> 36 #include <kscheduler.h> 37 #include <ksyscalls.h> 38 #include <ksystem_info.h> 39 #include <lock.h> 40 #include <low_resource_manager.h> 41 #include <messaging.h> 42 #include <Notifications.h> 43 #include <port.h> 44 #include <posix/realtime_sem.h> 45 #include <posix/xsi_message_queue.h> 46 #include <posix/xsi_semaphore.h> 47 #include <real_time_clock.h> 48 #include <sem.h> 49 #include <smp.h> 50 #include <team.h> 51 #include <timer.h> 52 #include <user_debugger.h> 53 #include <user_mutex.h> 54 #include <vfs.h> 55 #include <vm/vm.h> 56 #include <boot/kernel_args.h> 57 58 #include "vm/VMAnonymousCache.h" 59 60 61 //#define TRACE_BOOT 62 #ifdef TRACE_BOOT 63 # define TRACE(x...) dprintf("INIT: " x) 64 #else 65 # define TRACE(x...) ; 66 #endif 67 68 69 void *__dso_handle; 70 71 bool gKernelStartup = true; 72 bool gKernelShutdown = false; 73 74 static kernel_args sKernelArgs; 75 static uint32 sCpuRendezvous; 76 static uint32 sCpuRendezvous2; 77 static uint32 sCpuRendezvous3; 78 79 static int32 main2(void *); 80 81 82 static void 83 non_boot_cpu_init(void* args, int currentCPU) 84 { 85 kernel_args* kernelArgs = (kernel_args*)args; 86 if (currentCPU != 0) 87 cpu_init_percpu(kernelArgs, currentCPU); 88 } 89 90 91 extern "C" int 92 _start(kernel_args *bootKernelArgs, int currentCPU) 93 { 94 if (bootKernelArgs->kernel_args_size != sizeof(kernel_args) 95 || bootKernelArgs->version != CURRENT_KERNEL_ARGS_VERSION) { 96 // This is something we cannot handle right now - release kernels 97 // should always be able to handle the kernel_args of earlier 98 // released kernels. 99 debug_early_boot_message("Version mismatch between boot loader and " 100 "kernel!\n"); 101 return -1; 102 } 103 104 smp_set_num_cpus(bootKernelArgs->num_cpus); 105 106 // wait for all the cpus to get here 107 smp_cpu_rendezvous(&sCpuRendezvous); 108 109 // the passed in kernel args are in a non-allocated range of memory 110 if (currentCPU == 0) 111 memcpy(&sKernelArgs, bootKernelArgs, sizeof(kernel_args)); 112 113 smp_cpu_rendezvous(&sCpuRendezvous2); 114 115 // do any pre-booting cpu config 116 cpu_preboot_init_percpu(&sKernelArgs, currentCPU); 117 thread_preboot_init_percpu(&sKernelArgs, currentCPU); 118 119 // if we're not a boot cpu, spin here until someone wakes us up 120 if (smp_trap_non_boot_cpus(currentCPU, &sCpuRendezvous3)) { 121 // init platform 122 arch_platform_init(&sKernelArgs); 123 124 // setup debug output 125 debug_init(&sKernelArgs); 126 set_dprintf_enabled(true); 127 dprintf("Welcome to kernel debugger output!\n"); 128 dprintf("Haiku revision: %s\n", get_haiku_revision()); 129 130 // init modules 131 TRACE("init CPU\n"); 132 cpu_init(&sKernelArgs); 133 cpu_init_percpu(&sKernelArgs, currentCPU); 134 TRACE("init interrupts\n"); 135 int_init(&sKernelArgs); 136 137 TRACE("init VM\n"); 138 vm_init(&sKernelArgs); 139 // Before vm_init_post_sem() is called, we have to make sure that 140 // the boot loader allocated region is not used anymore 141 boot_item_init(); 142 debug_init_post_vm(&sKernelArgs); 143 low_resource_manager_init(); 144 145 // now we can use the heap and create areas 146 arch_platform_init_post_vm(&sKernelArgs); 147 lock_debug_init(); 148 TRACE("init driver_settings\n"); 149 driver_settings_init(&sKernelArgs); 150 debug_init_post_settings(&sKernelArgs); 151 TRACE("init notification services\n"); 152 notifications_init(); 153 TRACE("init teams\n"); 154 team_init(&sKernelArgs); 155 TRACE("init ELF loader\n"); 156 elf_init(&sKernelArgs); 157 TRACE("init modules\n"); 158 module_init(&sKernelArgs); 159 TRACE("init semaphores\n"); 160 haiku_sem_init(&sKernelArgs); 161 TRACE("init interrupts post vm\n"); 162 int_init_post_vm(&sKernelArgs); 163 cpu_init_post_vm(&sKernelArgs); 164 commpage_init(); 165 call_all_cpus_sync(non_boot_cpu_init, &sKernelArgs); 166 167 TRACE("init system info\n"); 168 system_info_init(&sKernelArgs); 169 170 TRACE("init SMP\n"); 171 smp_init(&sKernelArgs); 172 cpu_build_topology_tree(); 173 TRACE("init timer\n"); 174 timer_init(&sKernelArgs); 175 TRACE("init real time clock\n"); 176 rtc_init(&sKernelArgs); 177 timer_init_post_rtc(); 178 179 TRACE("init condition variables\n"); 180 condition_variable_init(); 181 182 // now we can create and use semaphores 183 TRACE("init VM semaphores\n"); 184 vm_init_post_sem(&sKernelArgs); 185 TRACE("init generic syscall\n"); 186 generic_syscall_init(); 187 smp_init_post_generic_syscalls(); 188 TRACE("init scheduler\n"); 189 scheduler_init(); 190 TRACE("init threads\n"); 191 thread_init(&sKernelArgs); 192 TRACE("init kernel daemons\n"); 193 kernel_daemon_init(); 194 arch_platform_init_post_thread(&sKernelArgs); 195 196 TRACE("init I/O interrupts\n"); 197 int_init_io(&sKernelArgs); 198 TRACE("init VM threads\n"); 199 vm_init_post_thread(&sKernelArgs); 200 low_resource_manager_init_post_thread(); 201 TRACE("init DPC\n"); 202 dpc_init(); 203 TRACE("init VFS\n"); 204 vfs_init(&sKernelArgs); 205 #if ENABLE_SWAP_SUPPORT 206 TRACE("init swap support\n"); 207 swap_init(); 208 #endif 209 TRACE("init POSIX semaphores\n"); 210 realtime_sem_init(); 211 xsi_sem_init(); 212 xsi_msg_init(); 213 214 // Start a thread to finish initializing the rest of the system. Note, 215 // it won't be scheduled before calling scheduler_start() (on any CPU). 216 TRACE("spawning main2 thread\n"); 217 thread_id thread = spawn_kernel_thread(&main2, "main2", 218 B_NORMAL_PRIORITY, NULL); 219 resume_thread(thread); 220 221 // We're ready to start the scheduler and enable interrupts on all CPUs. 222 scheduler_enable_scheduling(); 223 224 // bring up the AP cpus in a lock step fashion 225 TRACE("waking up AP cpus\n"); 226 sCpuRendezvous = sCpuRendezvous2 = 0; 227 smp_wake_up_non_boot_cpus(); 228 smp_cpu_rendezvous(&sCpuRendezvous); // wait until they're booted 229 230 // exit the kernel startup phase (mutexes, etc work from now on out) 231 TRACE("exiting kernel startup\n"); 232 gKernelStartup = false; 233 234 smp_cpu_rendezvous(&sCpuRendezvous2); 235 // release the AP cpus to go enter the scheduler 236 237 TRACE("starting scheduler on cpu 0 and enabling interrupts\n"); 238 scheduler_start(); 239 enable_interrupts(); 240 } else { 241 // lets make sure we're in sync with the main cpu 242 // the boot processor has probably been sending us 243 // tlb sync messages all along the way, but we've 244 // been ignoring them 245 arch_cpu_global_TLB_invalidate(); 246 247 // this is run for each non boot processor after they've been set loose 248 smp_per_cpu_init(&sKernelArgs, currentCPU); 249 250 // wait for all other AP cpus to get to this point 251 smp_cpu_rendezvous(&sCpuRendezvous); 252 smp_cpu_rendezvous(&sCpuRendezvous2); 253 254 // welcome to the machine 255 scheduler_start(); 256 enable_interrupts(); 257 } 258 259 #ifdef TRACE_BOOT 260 // We disable interrupts for this dprintf(), since otherwise dprintf() 261 // would acquires a mutex, which is something we must not do in an idle 262 // thread, or otherwise the scheduler would be seriously unhappy. 263 disable_interrupts(); 264 TRACE("main: done... begin idle loop on cpu %d\n", currentCPU); 265 enable_interrupts(); 266 #endif 267 268 for (;;) 269 cpu_idle(); 270 271 return 0; 272 } 273 274 275 static int32 276 main2(void *unused) 277 { 278 (void)(unused); 279 280 TRACE("start of main2: initializing devices\n"); 281 282 boot_splash_init(sKernelArgs.boot_splash); 283 284 commpage_init_post_cpus(); 285 286 TRACE("init ports\n"); 287 port_init(&sKernelArgs); 288 289 TRACE("init user mutex\n"); 290 user_mutex_init(); 291 292 TRACE("init system notifications\n"); 293 system_notifications_init(); 294 295 TRACE("Init modules\n"); 296 boot_splash_set_stage(BOOT_SPLASH_STAGE_1_INIT_MODULES); 297 module_init_post_threads(); 298 299 // init userland debugging 300 TRACE("Init Userland debugging\n"); 301 init_user_debug(); 302 303 // init the messaging service 304 TRACE("Init Messaging Service\n"); 305 init_messaging_service(); 306 307 /* bootstrap all the filesystems */ 308 TRACE("Bootstrap file systems\n"); 309 boot_splash_set_stage(BOOT_SPLASH_STAGE_2_BOOTSTRAP_FS); 310 vfs_bootstrap_file_systems(); 311 312 TRACE("Init Device Manager\n"); 313 boot_splash_set_stage(BOOT_SPLASH_STAGE_3_INIT_DEVICES); 314 device_manager_init(&sKernelArgs); 315 316 TRACE("Add preloaded old-style drivers\n"); 317 legacy_driver_add_preloaded(&sKernelArgs); 318 319 int_init_post_device_manager(&sKernelArgs); 320 321 TRACE("Mount boot file system\n"); 322 boot_splash_set_stage(BOOT_SPLASH_STAGE_4_MOUNT_BOOT_FS); 323 vfs_mount_boot_file_system(&sKernelArgs); 324 325 #if ENABLE_SWAP_SUPPORT 326 TRACE("swap_init_post_modules\n"); 327 swap_init_post_modules(); 328 #endif 329 330 // CPU specific modules may now be available 331 boot_splash_set_stage(BOOT_SPLASH_STAGE_5_INIT_CPU_MODULES); 332 cpu_init_post_modules(&sKernelArgs); 333 334 TRACE("vm_init_post_modules\n"); 335 boot_splash_set_stage(BOOT_SPLASH_STAGE_6_INIT_VM_MODULES); 336 vm_init_post_modules(&sKernelArgs); 337 338 TRACE("debug_init_post_modules\n"); 339 debug_init_post_modules(&sKernelArgs); 340 341 TRACE("device_manager_init_post_modules\n"); 342 device_manager_init_post_modules(&sKernelArgs); 343 344 boot_splash_set_stage(BOOT_SPLASH_STAGE_7_RUN_BOOT_SCRIPT); 345 boot_splash_uninit(); 346 // NOTE: We could introduce a syscall to draw more icons indicating 347 // stages in the boot script itself. Then we should not free the image. 348 // In that case we should copy it over to the kernel heap, so that we 349 // can still free the kernel args. 350 351 // The boot splash screen is the last user of the kernel args. 352 // Note: don't confuse the kernel_args structure (which is never freed) 353 // with the kernel args ranges it contains (and which are freed here). 354 vm_free_kernel_args(&sKernelArgs); 355 356 // start the init process 357 { 358 KPath bootScriptPath; 359 status_t status = __find_directory(B_SYSTEM_BOOT_DIRECTORY, gBootDevice, 360 false, bootScriptPath.LockBuffer(), bootScriptPath.BufferSize()); 361 if (status != B_OK) 362 dprintf("main2: find_directory() failed: %s\n", strerror(status)); 363 bootScriptPath.UnlockBuffer(); 364 status = bootScriptPath.Append("/Bootscript"); 365 if (status != B_OK) { 366 dprintf("main2: constructing path to Bootscript failed: " 367 "%s\n", strerror(status)); 368 } 369 370 const char *args[] = { "/bin/sh", bootScriptPath.Path(), NULL }; 371 int32 argc = 2; 372 thread_id thread; 373 374 thread = load_image(argc, args, NULL); 375 if (thread >= B_OK) { 376 resume_thread(thread); 377 TRACE("Bootscript started\n"); 378 } else 379 dprintf("error starting \"%s\" error = %" B_PRId32 " \n", args[0], thread); 380 } 381 382 return 0; 383 } 384 385